From 82695f7730258adb0f292f0853bfc168e3e39b03 Mon Sep 17 00:00:00 2001
From: Mark Nelson <markn@moodle.com>
Date: Mon, 19 Nov 2012 15:42:52 +0800
Subject: [PATCH] MDL-36609 javascript: ensure HTML element exists before
 attempting to perform JS functionality

---
 lib/javascript-static.js | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/lib/javascript-static.js b/lib/javascript-static.js
index f9b06acfe83..4b47d1d07d9 100644
--- a/lib/javascript-static.js
+++ b/lib/javascript-static.js
@@ -320,11 +320,16 @@ M.util.init_maximised_embed = function(Y, id) {
         if (Y.Lang.isString(el)) {
             el = Y.one('#' + el);
         }
-        var val = el.getStyle(prop);
-        if (val == 'auto') {
-            val = el.getComputedStyle(prop);
+        // Ensure element exists.
+        if (el) {
+            var val = el.getStyle(prop);
+            if (val == 'auto') {
+                val = el.getComputedStyle(prop);
+            }
+            return parseInt(val);
+        } else {
+            return 0;
         }
-        return parseInt(val);
     };
 
     var resize_object = function() {